<?php
namespace app\common\jssdk;

use think\facade\Cache;
use think\facade\Config;

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018\10\15 0015
 * Time: 17:55
 */
class Jssdk{

    private $appId;
    private $appSecret;

    public function __construct() {
        $this->appId = env("wxmp.appid");
        $this->appSecret = env("wxmp.secret");
    }

    public function getSignPackage() {
        $jsapiTicket = $this->getJsApiTicket();

        // 注意 URL 一定要动态获取，不能 hardcode.
        $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
        $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

        $timestamp = time();
        $nonceStr = $this->createNonceStr();

        // 这里参数的顺序要按照 key 值 ASCII 码升序排序
        $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

        $signature = sha1($string);

        $signPackage = array(
            "appId"     => $this->appId,
            "nonceStr"  => $nonceStr,
            "timestamp" => $timestamp,
            "url"       => $url,
            "signature" => $signature,
            "rawString" => $string
        );
        return $signPackage;
    }


    /**
     * 设置菜单
     */
    public function setMenu(){
        $accessToken = $this->getAccessToken();
        $menuUrl = 'https://api.weixin.qq.com/cgi-bin/menu/create?access_token='.$accessToken;
        $data = '{
                     "button":[
                      {
                           "name":"咨询问诊",
                           "sub_button":[
                               {
                                   "type":"view",
                                   "name":"遗传咨询",
                                   "url":"http://www.daruilife.cn/index/wechat/index",
                                },{
                                   "type":"view",
                                   "name":"在线名医",
                                   "url":"http://www.daruilife.cn/index/wechat/index",
                                },{
                                   "type":"view",
                                   "name":"健康管家",
                                   "url":"http://www.daruilife.cn/index/wechat/index",
                                }
                            ]
                       },{
                            "name":"严选商城",
                            "sub_button":[
                               {
                                   "type":"view",
                                   "name":"热点推荐",
                                   "url":"http://www.daruilife.cn/index/wechat/index",
                                },{
                                   "type":"view",
                                   "name":"甄选商品",
                                   "url":"http://www.daruilife.cn/index/wechat/index",
                                },{
                                   "type":"view",
                                   "name":"达康讲堂",
                                   "url":"http://www.daruilife.cn/index/wechat/index",
                                }
                            ]
                       },{
                            "name":"个人中心",
                            "sub_button":[
                                {
                                    "type":"view",
                                    "name":"我的报告",
                                    "url":"http://www.daruilife.cn/index/wechat/index",
                                },
                                {
                                    "type":"view",
                                    "name":"我的问诊",
                                    "url":"http://www.daruilife.cn/index/wechat/index",
                                },
                                {
                                    "type":"view",
                                    "name":"我的管家",
                                    "url":"http://www.daruilife.cn/index/wechat/index",
                                },
                                {
                                    "type":"view",
                                    "name":"我的数值",
                                    "url":"http://www.daruilife.cn/index/wechat/index",
                                }
                            ]
                       }]
                 }';


        $res = $this->httpPost($menuUrl,$data);
        var_dump($res);
    }

    private function createNonceStr($length = 16) {
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    private function getJsApiTicket() {
        // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
        $jsapi_ticket = Cache::get("jsapi_ticket");
        if(empty($jsapi_ticket)){
            $jsapi_ticket = '{"jsapi_ticket":"","expire_time":0}';
        }
        $data = json_decode($jsapi_ticket);
        if ($data->expire_time < time()) {
            $accessToken = $this->getAccessToken();
            // 如果是企业号用以下 URL 获取 ticket
            // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
            $res = json_decode($this->httpGet($url));
            $ticket = $res->ticket;
            if ($ticket) {
                $data->expire_time = time() + 7000;
                $data->jsapi_ticket = $ticket;
                Cache::set("jsapi_ticket",json_encode($data));
            }
        } else {
            $ticket = $data->jsapi_ticket;
        }

        return $ticket;
    }

    private function getAccessToken() {
        // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
        $access_token = Cache::get("access_token");
        if(empty($access_token)){
            $access_token = '{"access_token":"","expire_time":0}';
        }
        $data = json_decode($access_token);
        if ($data->expire_time < time()) {
            // 如果是企业号用以下URL获取access_token
            // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
            $res = json_decode($this->httpGet($url));
            $access_token = $res->access_token;
            if ($access_token) {
                $data->expire_time = time() + 7000;
                $data->access_token = $access_token;
                Cache::set("access_token",json_encode($data));
            }
        } else {
            $access_token = $data->access_token;
        }
        return $access_token;
    }

    private function httpGet($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 500);
        // 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。
        // 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
        //curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
        curl_setopt($curl, CURLOPT_URL, $url);

        $res = curl_exec($curl);
        curl_close($curl);

        return $res;
    }


    private function httpPost( $url, $param ){
        if (empty($url) || empty($param)) {
            return false;
        }

        $postUrl = $url;
        $curlPost = $param;
        $curl = curl_init();//初始化curl
        curl_setopt($curl, CURLOPT_URL,$postUrl);//抓取指定网页
        curl_setopt($curl, CURLOPT_HEADER, 0);//设置header
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
        curl_setopt($curl, CURLOPT_POST, 1);//post提交方式
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER,true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $curlPost);
        $data = curl_exec($curl);//运行curl
        curl_close($curl);

        return $data;
    }

}